Attachment for warp-knitting machines.



E. H. HEATH.

ATTACHMENT POR WARP KNITTING MACHINES. APPLICATION FILED JUNE 29, 1906.

PATENTBD JUNE 16, 1908.

1HE mums PETER: co., wAsmNc1oN,-n. c.

UNITE 2li' SA'FFS EDGAR H. HEATH, OF CHICAGO, ILLINOIS.

ATTACHMENT FOR WARP-KNITTING MACHINES.

Specification of Letters Patent.

Patented June 16, 1908.

Application filed June 29, 1906. Serial No. 323,984.

To all whom it may concern:

Be it known that I, EDGAR H. HEATH, a I

citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Attachments for Warp- Knitting Machines, of which the following is a speciiication.

rlhis invention relates to improvements in that class of knitting machines in which reciprocating or shifting thread-guide bars are used, and the improvements which form the subject matter of this application pertain to the means for locking the bars in their adjusted positions.

The especial object of my invention is to provide easily operated devices which will positivelyT lock the thread guide bars against cndwise movement after each shifting operation, thus avoiding the accidental displacement of the bars which sometimes occurs where they are locked merely by frictional engagement.

For the purpose of this application for patent, I have shown and will describe only so much of a knitting machine, as is germane to my invention, it being understood that it is applicable to any form of knitting machine in which thread-guide bars are employed.

In the accompanying drawing which forms a part of this application-Figure l shows in elevation a portion of the frame of a knitting machine with my improvements applied thereto. Fig. 2 is a side view of the locking means which constitute my invention. Fig. 3 is a sectional view on an enlarged scale of the locking-pin and adjacent parts.

Referring to the details of the drawing, A represents the portion of the frame of a knitting machine which supports the elements forming my invention.

H is a shaft which is journaled in suitable bearings on the frame A and which may be driven in any approved manner.

G is a cam mounted on and rotating with the shaft I'I, and formed with concentric camfaces g1 and g2.

B represents three thread-guide bars of common form which are slidably arranged in the plate b3 in the usual manner. To the upper side and near the end of each guide bar is secured a plate b1 in the face of which are formed notches t2.

Secured to the frame A is a plate C which is provided with a boss or thickened portion c1. This portion c1 is drilled vertically to l provide suitable openings for locking pins D,

and to form recesses c2 at the upper end of such openings, and the upper edge ofthe boss is cut away as at c4.

The lower ends of the pins D are pointed or beveled to 'fit accurately the recesses b2, and the upper ends are provided with flat heads cl2. Surrounding each of the pins within the recess c2 is an expansion coilspring d2 one end of which bears against the head d2 and the other end against the boss c1, so that the normal action of the spring is to lift the pin out of the notches b2.

Journaled in bearings c3 on the plate C is a rocking shaft E, on the outer end of which is secured a lever F. On the lower end of this lever is a lug which frictionally engages the periphery of the cam G, thus effecting the operation of the lever. On the inner end of the shaft E is secured a plate e1 which is formed with a horizontal extension e2 which is adapted to rest in the cut-out portion c4 of the plate C. This extension is provided with threaded openings to receive set-screws c3 the lower ends of which are adapted to bear down on the heads d2 of the lockingpins D when the parts are in the position shown in Fig. 3. A lock nut e4 is preferably mounted on the upper end of the set-screw e, The plate el being 'lixed on the shaft E, will be rocked with the latter, through the action of the cam G on the lever F, thus caus-` ing the set-screw c3 to alternately bear down upon and release the pin D, depending upon the relative positions of the lug f2 periphery of the cam, as will be readily understood. By adjustments of the setscrew, the vertical movements of the pin will be controlled, and when the parts are in the positions shown in Fig. 3, the pin will be positively locked in one of the notches t2 and will be so held until the cam-face g2 is brought, through the rotation of the cam, opposite the 111s f2- The means for operating the locking-plate el may be varied to suit the construction and operation of the different types of machines employing thread-guide-bars, hence I do not wish to be limited to the exact means shown. I am aware that in this art, cooperating notched bars and centering pins are not new, but so far as I am advised, the pins have been .held in frictional contact with the bars by yielding means which do not positively lock them in place, hence, through the jarring of the machines incidental to use, the pins on the sometimes get out of place With resulting damage to parts of the machine or to the fabric being knitted or to both.

Having thus described my invention, what I claim, is

1, In a knitting machine having adjustable notched thread guide-bars, means for locking said bars, consisting of pins adapted to engage the notches in said bars, and means for positively locking said pins in such engagement.

2. In a knitting machine having adjustable notched thread-guide bars, means for locking said bars, consisting of pins adapted to engage the notches in said bars, means for positively locking said pins in such engagement, and means for releasing the pins from such engagement.

3. In a knitting machine having adjustable notched thread-guide bars7 means for locking said bars, consisting of pins adapted to engage the notches in said bars7 means for positively locking said pins in such engagement, and means l'or automatically releasing the pins from such engagement.

4. In a knitting machine having adjustable notched thread guide-bars, means for locking said bars, consisting of pins adapted to engage the notches in the bars, adjustable means for limiting the movements 'of said pins, means for positively locking said pins in engagement With said bars, and means for releasing the pins from such engagement.

5. In a knitting machine having adjustable notched bars, means for locking said bars, consisting of vertically moving pins adapted to engage the notches in the bars, means for controlling the extent of the vertical movements of the pins, means for positively locking the pins in engagement with said bars, said means comprising a locking Vplate common to all of said j ins, a rockingshaft secured to said plate, a ever secured to said shaft and a cam for operating said lever.

In testimony whereof .I aillix my signature in presence ol tWo Witnesses.

EDGAR H. HEATH. Witnesses z C. F. BAUM, IVM. B. MOORE. 

